shib·bo·leth (shĭbə-lĭth, -lĕth′)
1. A word or pronunciation that distinguishes people of one group or class from those of another.
a. A word or phrase identified with a particular group or cause; a catchword.
b. A commonplace saying or idea.
3. A custom or practice that betrays one as an outsider.
[Ultimately from Hebrew šibbōlet, torrent of water, from the use of this word to distinguish one tribe from another that pronounced it sibbōlet (Judges 12:4-6).]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.